The best replacement for lingo is vonage.

The best alternatives to lingo are rated as following:
★★★★★  vonage
★★  actionscript
★  slang
★  jargon
★  armageddon
★  packet8
★  little pim
★  allvoi
  broadvoice
  magic jack
  lingo
  radikal
  sunrocket
  vontage
  primus

Your alternative for lingo is not listed? Suggest!
Speaking about lingo, one probably shouldn't forget about softphone.

Other search terms related to lingo and their ratings are:
★★★★★ softphone
You have in mind a companion for lingo and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of lingo in all years. Click on graph for more.
lingo
vonage
actionscript